check type when assignment

[Bruno Desthuilliers]

Diez B. Roggisch wrote:
> pipehappy wrote:
> 
> 
>>Hello everyone:
>>
>>Is there a way to check the type when do assignment?
>>
>>if I write:
>>ab = bc
>>and want to make sure the return value of isinstance(bc, klass) is True
>>or I will raise
>>a exception.
> 
> 
> In general, not doable. The assignment operator is not overloadable.
> 
> Only if you use assignments of the form
> 
> a.foo = bar
> 
> you could overwrite the __setattribute__-method 

(Or use a Descriptor)

> to achieve what you want. 


> 
> Diez


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"